Charles e



(NoMode lJ Y r 0-, E. GOULD.

DIE FOR MAKING ROLLED FORGINGS.

N0. 418,562. Patented Dec'.,31, 1889 V Fl'g -m f x 39 """v:

W 4 Z J /\/s /7-aqh 4 3 Q E'IQQ-WLATT f UNITED STATES PATENT OFFICE. 1

CHARLES E. GOULD, OF LEOMINSTER, lVIASSACHUSETTS, ASSIGNO'R TO-THE GOULD'ROLLING MACHINE COMPANY, OF SAME PLACE.

DIE FOR MAKING ROLLED FORGINGS.

SPECIFICATION forming part of Letters Patent No. 418,562, dated December 31, 1889.

Application filed August 14, 1889. Serial No. 320,726. (No model.)

To all whom it may concern.-

Be it known that 1, CHARLES E. GOULD, of Leominster, in the county of WVorcester, State of Massachusetts, have invented a certain new and useful Improvement in Dies for Making Rolled Forgings, of which the following is a description sufficiently full, clear, and exact to enable any person skilled in the art or science to which said invention appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a side elevation of my improved dies represented as in use; Fig. 2, an enlarged vertical section taken on the line a: a: in Fig. 1; Fig. 3, a vertical section taken on the line 'y y in Fig.1; Fig. 4,'a plan view of the convex die, and Figs. 5 and 6 sectional views illustrating details of construction.

Like letters of reference indicate corresponding partsin the different figures of the drawings.

My invention relates to dies for making rolled forgings which are especially applicable for use with rolled-forging machines having a vertical rotary or reciprocating movement; and it consists in certain novel features, as hereinafter fully set forth and claimed, the obj ectbeing to produce a simpler, cheaper, and more effective device of this character than is now in ordinary use.

The nature and operation of the improvement will be readily understood by all conversant with such matters from the following explanation.

In the drawings, A B represent the dies considered as wholes. The-bed-pieces d f of these dies are curved on arcs of the same circle and are provided with screw-holes g at each end to attach them to the machine. The working-face h of the die A is disposed longitudinally on the outer face of the bed-piece d, forming a die convex in longitudinal section. In the die illustrated, which is particularly adapted for rolling balls or similar globular forms, the working-face h isv provided centrally with a longitudinal groove 6, which is curved in cross-section and widens and deepens gradually from its forward end j to its rear end It, at which a point it is nearly semistock, so as to cause a waste thereof.

engaging the rod on opposite sides.

lindrical articles, much more perfect.

crease in height or width from the toe j to' the rear end is of said face, as shown in Fig. 4. The faces of the bosses are punctured or indented at m in such manner that the edges of said indentations do not project above or beyond the surface of the bosses. Such indented or intaglio biting-surfaces have the advantage over serrated or cameo biting-surfaces in that they present a truer face to the work, wear longer, and leave the stock in better condition for the next rolling operation, as they do not rough-up the cone end of the In case these dies become worn down new indentations 'can be readily made. The die B has its working-face p disposed longitudinally on the inner face of its curved bed-piece f, forming a die concave in longitudinal section. Said working-face is provided with a groove and diverging inclined cutting-bosses 7", having indented faces all constructed in substantially the same manner as the face of the die A.

In the use of my improvement the dies are placed in the position shown in Fig. 1, their working-faces being adjacent and standing in a plane passing longitudinally through the centers of both. The rod or ingot H from which the forging is to be formed "is placed diagonally across the dies, which move in opposite directions, the toes or points j o of their working-faces approaching each other and Asthese dies pass each other their cutting-bosses Z4" are forced into the rod forming the ball z in a manner readily understood by all conversant with such matters. The heated metal of the rod is forced into the indentations m in the beveled faces of the cutting-bosses, the dies being thus prevented from slipping thereon, and the rod caused to rotate rapidly between them as they move. This renders the formation, especially of spherical or cy- The beveled faces of the bosses l r, inclining outward, as shown in Fig. 2, force the superfluous metal away from theball into the body of the bar. I

Having thus explained my im'ention,wllat being provided with indentations,ihe bases I claim isof said indentations being flush with the sur- The combination of a die concave longiface of the bosses, substantially as described. 10 tudinally and a die convex longitudinally, the CHARLES E. GOULD. 5 faces of said dies having grooves and out- Witnesses:

wardly-beveled cutting-bosses at the sides of CHARLES T. BROWN,

the grooves, the beveled sides of said bosses F. J. \VOODBURY. 

